start FTP server 'yes' or 'no'

Default: START_FTP='yes' Listen for an incoming connection on port FTP_PORT.

Default: FTP_PORT='21' If set, then bind the FTP port only to ip-address.

Default: FTP_BIND=''
Example: FTP_BIND='192.168.1.1'
enable support for NAT 'yes' or 'no'

Default: FTP_NAT_MODE='no' List files beginning with a dot ('.') even when the client doesn't append the '-a' option to the list command.
This is a workaround for badly configured FTP clients.

Default: FTP_LIST_DOT_FILES='no' Logrotate interval: daily, weekly, monthly.
How often shall logrotate be executed? Number of log files to save.
This is the number of log file archives that are kept on the system by logrotate, before they are outdated and removed.